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400-251 Exam Questions - Online Test


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Q1. What are two protocols that HTTP can use to secure sessions? (Choose two)

A. HTTPS

B. AES

C. TLS

D. AH

E. SSL

Answer: A,E

Q2. Which command sequence can you enter to enable IP multicast for WCCPv2?

A. Router(config)#ip wccp web-cache service-list Router(config)#interface FastEthernet0/0

Router(config)#ip wccp web-cache group-listen

B. Router(config)#ip wccp web-cache group-list Router(config)#interface FastEthernet0/0 Router(config)#ip wccp web-cache group-listen

C. Router(config)#ip wccp web-cache group-address 224.1.1.100 Router(config)#interface FastEthernet0/0

Router(config)#ip wccp web-cache redirect in

D. Router(config)#ip wccp web-cache group-address 224.1.1.100 Router(config)#interface FastEthernet0/0

Router(config)#ip wccp web-cache group-listen

E. Router(config)#ip wccp web-cache group-address 224.1.1.100 Router(config)#interface FastEthernet0/0

Router(config)#ip wccp web-cache redirect out

Answer: D

Q3. What is the effect of the Cisco Application Control Engine (ACE. command ipv6 fragment min-mtu 1024 ?

A. It configures the interface to fragment packets on connections with MTUs of 1024 or greater

B. It sets the MTU to 1024 bytes for an IPv6 VLAN interface that accepts fragmented packets

C. It configures the interface to attempt to reassemble only IPv6 fragments that are less than 1024 bytes

D. It configures the interface to fragment packets on connections with MTUs of 1024 or less

E. It configures the interface to attempt to reassemble only IPv6 fragments that are at least 1024 bytes

Answer: E

Q4. Which three statements about the Cisco IPS sensor are true? (Choose three.)

A. You cannot pair a VLAN with itself.

B. For a given sensing interface, an interface used in a VLAN pair can be a member of another inline interface pair.

C. For a given sensing interface, a VLAN can be a member of only one inline VLAN pair, however, a given VLAN can

be a member of an inline VLAN pair on more than one sensing interface.

D. The order in which you specify the VLANs in a inline pair is significant.

E. A sensing interface in inline VLAN pair mode can have from 1 to 255 inline VLAN pairs.

Answer: A,C,E

Explanation:

Inline VLAN Interface Pairs

You cannot pair a VLAN with itself.

For a given sensing interface, a VLAN can be a member of only one inline VLAN pair. However, a given VLAN can be a member of an inline VLAN pair on more than one sensing interface.

The order in which you specify the VLANs in an inline VLAN pair is not significant.

A sensing interface in inline VLAN pair mode can have from 1 to 255 inline VLAN pairs.

Q5. Refer to the exhibit 

Flexible NetFlow is failing to export flow records from RouterA to your flow collector. What action can you take to allow the IPv6 flow records to be sent to the colle

A. Set the NetFlow export protocol to v5

B. Configure the output-features command for the IPV4-EXPORTER

C. Add the ipv6 cef command to the configuration

D. Remove the ip cef command from the configuration

E. Create a new flow exporter with an IPv6 destination and apply it to the flow monitor

Answer: D

Q6. DRAG DROP

Drag each IPv6 extension header on the left into the recommended order for more than one extension header In the same IPv6 packet on the right?

Answer:

Explanation:

1: IPv6 header; 2: Hop by Hop option; 3. Destination options; 4: Routing; 5: Fragment; 6: Authentication; 7: Encapsulating Security Payload.

Q7. What is the purpose of enabling the IP option selective Drop feature on your network routers?

A. To protect the internal network from IP spoofing attacks.

B. To drop IP fragmented packets.

C. To drop packet with a TTL value of Zero.

D. To protect the network from DoS attacks.

Answer: D

Q8. What IOS feature can prevent header attacks by using packet-header information to classify traffic?

A. CAR

B. FPM

C. TOS

D. LLQ

E. TTL

Answer: B

Q9. NWhich two statements about the ISO are true? (Choose two.

A. The ISO is a government-based organization.

B. The ISO has three membership categories: Member, Correspondent, and Subscribers.

C. Subscriber members are individual organizations.

D. Only member bodies have voting rights.

E. Correspondent bodies are small countries with their own standards organization.

Answer: B,D

Explanation: Member bodies are national bodies considered the most representative standards body in each country. These are the only members of ISO that have voting rights.

Q10. Which Cisco product solution is designed for workload mobility between public-public and

private-public clouds?

A. Cisco Cloud Orchestrator

B. Cisco Unified Cloud

C. Cisco Intercloud Fabric

D. Cisco Metapod

Answer: C